Percentages, discounts, tips and splitting bills — the money math you use at shops, restaurants and marketplaces, worked out in plain steps.
You got a raise — congratulations. Then comes the question: how big is it, really? A $3,000 raise on a $90,000 salary (3.3%) versus a $40,000 salary (7.5%) — the dollar amount only tells half the story. The percentage tells you the rest. The Formula Raise percentage = (raise amount ÷ old salary) × 100 … Read more
You’ve probably heard that compound interest is "the most powerful force" in money. But what do those phrases actually mean in numbers? The difference between simple and compound interest is one small idea — and once you see it worked out, you’ll never mix them up again. No investment advice here — just the math, … Read more
Nobody teaches you how to tip. You’re just expected to know — at restaurants, in taxis, when the food delivery driver hands you your bag, at the hair salon. And the "right" amount changes depending on where you are in the world, which makes the whole thing even more confusing. Here’s the good news: tipping … Read more
Splitting a bill is one of those small moments that can feel strangely tense. Everyone’s had a good time, the plates are cleared, and then the bill lands in the middle of the table like a pop quiz nobody studied for. Somebody reaches for their phone calculator. Somebody else says "just split it evenly" a … Read more
“40% OFF — TODAY ONLY!” The sign is bright red, the jacket looks great, and the original price tag says 3,200. But what’s the actual price? Standing in the aisle doing long multiplication in your head is nobody’s idea of fun — and stores count on that confusion. Good news: finding a sale price takes … Read more
The bill lands on the table: 860. You want to leave a 15% tip, your phone is buried in your pocket, and the waiter is hovering nearby. Your brain does that thing where it just… stops. Percentages feel hard because most of us learned them as formulas in school — multiply this, divide by a … Read more
You know the moment. You’re standing in a shop holding a jacket with a red “30% OFF” tag, and your brain quietly freezes. Is that actually a good deal? What’s the real price? You pull out your phone, then feel a bit silly about it. Or the bill lands at a restaurant. Four of you. … Read more
